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Studies of Glasses and the Glass Transition

Studies of Glasses and the Glass Transition
玻璃和玻璃化转变的研究
批准号:
8802284
负责人:
Sidney Nagel
金额:
$26.34万
依托单位:
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1988
资助国家:
美国
项目状态:
已结题
起止时间:
1988-05-01 至 1991-10-31

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中文摘要
翻译
他们提出了一系列实验和计算机模拟,这将有助于阐明玻璃化转变的性质,并有助于阐明玻璃态本身的性质。他们将使用他们最近开发的比热光谱仪来研究玻璃化转变上方出现的驰豫时间分布的形状和温度相关性。这些数据将根据考兹曼标准进行解释,以确定比热异常可能发生的位置。他们的计算机模拟和非线性敏感度研究的目的是找到与玻璃弛豫相关的长度尺度。他们还计划研究玻璃中发生的低于Tg的二次弛豫以及同一玻璃的低温比热,看看它们是否可以通过目前的玻璃态理论相互关联。他们还将测量As(II)Seenide的X射线衍射,并与中子衍射测量一起使用,以确定这种玻璃的部分结构因子。
英文摘要
They propose a series of experiments and computer simulations which will help to clarify the nature of the glass transition and help to elucidate the properties of the glass state itself. They will use their recently developed specific heat spectrometer to investigate the shape and temperature dependence of the distribution of relaxation times that appear above glass transitions. The data will be interpreted in light of the Kauzmann criterion for where the specific heat anomaly can occur. Their computer simulations and nonlinear susceptibility studies are aimed at finding a length scale associated with the glassy relaxation. They also plan to study the secondary relaxations that occur in glasses below Tg and the low temperature specific heat of the same glasses to see if they can be related to one another by some current theories of the glassy state. They will also measure the x-ray diffraction of Arsenic (II) Selenide to be used in conjunction with neutron diffraction measurements to determine the partial structure factors of this glass.
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REU Site: Summer Research Projects in Contemporary Physics
  • 批准号:
    2051126
  • 项目类别:
    Standard Grant
  • 资助金额:
    $39.27万
  • 财政年份:
    2021
  • 负责人:
    Sidney Nagel
  • 依托单位:
REU Site: Summer Research Projects in Contemporary Physics
  • 批准号:
    1757898
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $42.54万
  • 财政年份:
    2018
  • 负责人:
    Sidney Nagel
  • 依托单位:
Workshop to identify and explore the grand challenges in experimental soft condensed matter science; Arlington, VA; January 2016
  • 批准号:
    1560936
  • 项目类别:
    Standard Grant
  • 资助金额:
    $5.0万
  • 财政年份:
    2015
  • 负责人:
    Sidney Nagel
  • 依托单位:
REU Site: Summer Research Projects in Contemporary Physics
  • 批准号:
    1461168
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $36.97万
  • 财政年份:
    2015
  • 负责人:
    Sidney Nagel
  • 依托单位:
海外基金